you are taking the following test:

Grade: 8,    Subject: Math,    Topic: Number and Number Sense Scientific Notation Add, Subtract, Multiply and Divide
 Question 1: 5.67 × 10 7   +   7.34 × 10 7   =   ? 13.0 × 10 8 13.01 × 10 14 1.301 × 10 8 1.301 × 10 7
 Question 2: 8.548 × 10 15   −   2.224 × 10 15   =   ? 6.324 × 10 15 5.324 × 10 15 6,324 × 10 14 6.024 × 10 0
 Question 3: (4 × 10 4)    ×    (2 × 10 3)   =  ? 8 × 10 7 6 × 10 7 8 × 10 12 8 × 10 1
 Question 4: (6 × 10 5)   ÷   (2 × 10 2)   =  ? 8 × 10 5 3 × 10 10 3 × 10 2.5 3 × 10 3
 Question 5: 2.55 × 10 7  +  50,000,000   =   ? 7.55 × 10 7 3.05 × 10 7 2.555 × 10 7 2.60 × 10 7
 Question 6: 2.55 × 10 7   −  10,000,000   =  ? 2.551 × 10 7 1.55 × 10 7 2.54 × 10 7 2.45 × 10 7
 Question 7: (4 × 10 4)   ×   1,000   =   ? 4 × 10 7 400 × 10 7 4 × 10 8 4 × 10 6
 Question 8: (8.4 × 10 8)   ÷   10,000   =   ? 8.0 × 10 8 4.4 × 10 8 8.4 × 10 4 8.4 × 10 2
 Question 9: Weight of the Earth is 5.9736 × 10 24 Kg. Mass of the Venus is 4.8685 × 10 24 Kg. What is the combined weight of the Earth and Venus? 10.8421 × 10 26 Kg 10.8421 × 10 23 Kg 1.08421 × 10 25 Kg 10.8421 × 10 25 Kg
 Question 10: Planet Venus is 1.08 × 10 8 Km away from the Sun and Planet Mercury is 5.79 × 10 7 Km from the Sun. How much farther away is the planet Venus from the Sun as compared to the planet Mercury? 6.21 × 10 7 Km 5.01 × 10 8 Km 5.10 × 10 7 Km 5.01 × 10 7 Km
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